551213407 has 4 divisors (see below), whose sum is σ = 553685440. Its totient is φ = 548741376.

The previous prime is 551213381. The next prime is 551213413. The reversal of 551213407 is 704312155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 551213407 - 2¹⁵ = 551180639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551213417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1235682 + ... + 1236127.

It is an arithmetic number, because the mean of its divisors is an integer number (138421360).

Almost surely, 2^551213407 is an apocalyptic number.

551213407 is a deficient number, since it is larger than the sum of its proper divisors (2472033).

551213407 is a wasteful number, since it uses less digits than its factorization.

551213407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472032.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 551213407 is about 23477.9344704767. The cubic root of 551213407 is about 819.9233554181.

The spelling of 551213407 in words is "five hundred fifty-one million, two hundred thirteen thousand, four hundred seven".